Improvement in machine for



yr f www? NPETERS. PHUTd-LITMOGRAPHR, WASHINGTON D C tait-rd ,gita/tra gaat agua ALEXANDER W. KELLY AND- JHII-ll SAMUEL, OF PHILADELPHIA,

vPENNSYLVANIA.

Letters Patent No. 98,270, dated December 2,8, 1869.

IMPROVEMENT IN MACHINE FOR. G-RINDING GLA-SIS JARS.

The Schedule referred to in these Letters Patent and making part of the same.

We, ALEXANDER W. KELLY and JOHN B. SAM- UEL, of the city of Philadelphia, in the Stateof Penusylvania, have invented certain Improvements in Machines for Grinding Glass Jars, of which the following is a specification.

I Nature and Objects `of 'theInventt'm .the Aupper surface of the saihorizontalgrinding-disk,A

the object of our invention being to facilitate the operation of grinding the mouth-edges of a large number of glass jars at the same time in one machine, to facilitate in the removal of the ground jars and the substitution of others vto be ground, and to prevent the rapid waste of the' grinding sand and water required in grinding such vessels.

Description of the-Accompanying Drawings. Figure 1A is a side elevationpf. a grindingvmachine embodying our invention.

Figure 2, a plan view of iig. 1. A

General Description.

AB is a strong, steady frame, supporting, in--its centre, in suitable bearings, the Vertical main shaft 0, which carries the horizontal grinding-disk D.

E E are two of thevertical rotating shafts, arranged around-the shaft C, -at suitable distances therefrom, and each provided with one 1 of each of the adjustable armse and e", thearms e e having their ends itted with the adjustable rings 3 3, and the arms e" e" fitted with the sliding holding-weights FF.

The upper end of the main shaft G has lixedupon it a small spur-wheel, c', which gears into a spurwheel, cf, xed on a short shaft, and carries a small pinion, that gears into two small 'separate spurwheels, c c and these small spur-wheels c. gear respectively into two larger spur-wheels, 4 4, which are fixed on the upper ends of the shafts E E, and, consequently, when rotary motion is given to the main shaft C, the severa-l surrounding shafts E E will be rotated in the contrarydireetion, .but with greafly .reduced speed.

rlhe adjustable rings 3 3 each consist of two nearly semieircular springs, attached together to the respective ends of the adjustable arms e e', so as to l form a duidedhorizontali ring, and have tted to them a thumb-screw, 5, whereby the said rings can be contracted or adjusted in diameter, to receive the neck of the jar. (See fig. 1.)

The adjustable arms elf e have each branchingA arms, 6 6, through holes in the ends of which the respective Vertical stems j" f', of the weights F F, slide freely up and down within proper limits.

The lower end of each of t-he weights Fis concave,

and of sufficient diameter te fit around upon the bottom ofthe jar to be ground@ AThe whole length of eaeli of the arms e' e" is such as will carry around the jarlthey support, vso asV4 to alternately clearthe main or entralshait G, and reach thc/'outer' 'edge'of' the griiding-disk vI), during* each full rotation of the carrying-shaft E.

In using the machine, the necks of the jars, xa',

to be ground, are placed in the previously-adjusted rings 3 3, (first-lifting the weights F for the purpose,- and then letting it t down by. gravitation around over the bottom of the jar,) the diameters of the said rings 33 being adjusted to let the necks ef the-jars freely slip down, and rest their mouth-edges uponthe grinding-disk I) and, also, the height of the arms e adjusted so that the shoulders of the jars will come in contae't'with and rest uponJ the top edges of the rings, *and thus be stopped in their descent when the j edges of the mouthsof said jars have been ground away to the desired'distanee from the shoulders.

' The disk Dis of cast-iron, 'sand andA water being caused to fall thereon as the grinding-medium.

It is intended to use three or four of the shafts E in one machine, and as many oftheJ jar-carrying arms eland e on each sliaftE as the diameter of the disk D will permit.

One complete rotation of either .of the carryingshafts E occupying about half a minutethe speed at which they are intended to be drivencompletes the grinding of all the jars it carries, and, therefore, it will be evident that a very large number of the jars x can simultaneously be ground with facility on .one machine in the half minute, and that-as the grindingdisk is horizontal in its grinding-position, the sand -and water required will not waste or run off the disk too rapidly, as is the case in gri11ding-inacl1ines havbination with the rotary shaft E, and as arranged to operate together in supporting and holding the tr--l disk D, the said parts being arranged to operate jar a: in a vertical position, substantially as and for together, substantially as and for the purpose hereintlle purpose hereinbefore described and set forth. before described and set'forth.

2. The combination of avrseries of vertical rntat- ALEXANDER W. KELLY.

ing shafts, E, each provided with a series of adjust?l JOHN B. SAMUEL. able arms, e' e, having, respectively, the iings 3 and l l weights F attached,- for receiving,r and supporting Witnesses:

glass jars thereon in vertical positions, as described, v' BENJ. MORISON,

with the central rotating shaft' C, and its horizon- WM. H. MORISON. 

